Saw
this article over at Android Police that might explain the design of the S3. No idea if it's true, but it is some interesting analysis.
Sounds like pure speculation to me imo. Everything they mentioned about the S3 applies to the Galaxy Nexus. The only difference is the Galaxy Nexus had more border ontop then the bottom which is obviously due to not having hardware buttons. I think the design decision to make these little things asymetrical is more to give subtle clues about orientation of the phone. I've own the original Galaxy S and had a Galaxy Nexus as well and they were dead easy to figure out which end was the top due to the "hump" at the bottom of those phones, you could pull the phone out of your pocket and have it oriented the right way in your hand just by touch. With the S3 and no hump that's gonna be harder to do the subtle difference in curves and possibly the weight distribution is all the user is going to have to go by.
Regarding the S3 display being pentile. I think people are making a big deal about it. The two points critics always brings up about pentile is the "jagginess" and/or the graininess (screen door effect) when displaying solid colors. Having owned the Galaxy Nexus and the Galaxy S I can tell you that both are true on the Galaxy S but on the Galaxy Nexus you don't see jagginess the PPI is high enough that it's not a factor although the graininess is still there. However as Anandtech's preview mentioned Samsung seems to have fixed the graininess issue with the S3 screen so that makes the pentile argument a moot point. One thing I do hope they improve on the S3 screen is the brightness... the Galaxy Nexus brightness was just horrible imo.
I'd admit I was a bit disappointed by the S3 announcement but its still clearly gonna be at the top end of the phone chain. While the specs may not be rival destroying I think its going to be the little things that haven't been mentioned that will make the S3 a bigger improvement over the S2. Specifically while the camera is still 8 mp its suppose to be using a newer sensor with BSI, this should be a big improvement over the S3 in low light situations. Another thing I notice is the speaker... while the S2 had two tiny slits for speakers on the S3 it looks like the speaker (or at least the grill) is significantly bigger. Hopefully this translates into better and louder audio which is again one of those things that don't get mentioned alot but in real world usage its important (one of the reasons I sold my Galaxy Nexus).
For all the people who are disappointed by the S3 reveal maybe Samsung can come through when the NA model is announced and treat us with a pair of dual core Cortex A15 Exynos with Mali T604 GPU since in the Exynos promotional video that was the other CPU that was mentioned besides the 4412 that's in the International S3.